Seller notes

Prox Piston Kit Fits:Honda TRX400EX 400X 1999-2014Honda XR400R 1996-2004 DetailsIf you’re looking for a cast piston that runs like a top and slides like it’s on ice, pick up a Pro X Piston Kit for you bike, UTV, or ATV. Pro X pistons are the premier cast piston made from a specialized low-expansion, low-friction aluminum alloy, commonly used by Japanese OEM engine manufacturers to give the piston an incredibly low co-efficient of friction. For you, this translates to a cast piston perfect fo...

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